Make the most of your curtain rods. This drapery arm from the Bradley Collection is fastened to the wall at one hinged point.
Curtains slide on the rod as on any conventional curtain rod. But this rod can rotate out from the wall, too, to act as a space divider. This could also be used away from the window in a location where you want the option for a wall-mounted space divider that could fold against the wall when not needed.